Step-up file rack



FIG. 1 is a top, front, left-side perspective view of a step-up file rack showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a right side elevational view thereof, the left side elevational view being a mirror image;

FIG. 5 is a rear elevational view thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a step-up file rack, as shown and described. 